In 2011 when Manny Pacquiao won a tight decision over Juan Manuel Marquez in the third fight between them, Pacquiao's zealous supporters weren't simply content to see their man get a win many experts didn't believe he deserved.

The Pacquiao fans had to bellyache about it as a way to try to explain why he didn't win more clearly. That point of view clearly disregarded the fact that each of their first two bouts were exceptionally close.

I imagine they're only going to go through the roof when they hear what Pacquiao trainer Freddie Roach told the Los Angeles Times' estimable sports columnist Bill Dwyre about the finish of Pacquiao's fourth fight with Marquez. That one, you may remember, ended when Pacquiao got caught by a Marquez right hand on Dec. 8, 2012, in Las Vegas, and Pacman went face first to the canvas, where he was out cold.

Roach told Dwyre that there was plenty of concern for Pacquiao's well-being immediately after the punch. Pacquiao didn't move for several anxious moments.

"My girlfriend's a doctor and she thought he was dead." - Freddie Roach

What's bound to set off the Pacquiao fans, though, is Roach's explanation to Dwyre two months after the fact about why the knockout occurred. In the parlance of the Pacquiao fans, it was the old "foot stomp," Roach said.

"When you have a lefty [Pacquiao] fighting a right-hander [Marquez], you have guys stepping on each other's lead foot more than righty-righty or lefty-lefty.

We were concerned enough about that happening — because it had happened a lot in their other fights, and even could be used as a strategy by Marquez — to ask the referee to come to our dressing room before the fight so we could warn him to watch for that.

But what happened was the opposite, and I didn't see it clearly until later, when I looked at overhead camera shots.

Marquez didn't step on Manny's foot. Manny stepped on Marquez's foot. And when Marquez pulled it out, it sent Manny off-balance and forward — right into the perfect right hand.

I wasn't ready for that. I had told Manny, when he steps on your foot, don't pull away. But the other way? I didn't see that coming."

So yes, Pacman fans, foot stomping was the reason that Manny was knocked out. This time, though, it was Pacman who did the foot stomping.

Pacquiao and Marquez are likely to fight for a fifth time in the fall. Roach is concerned about his friend's health, but said he believes he's now fine. But Roach told Dwyre he'll keep a sharp watch on Pacquiao.

If the fifth fight happens, perhaps promoter Bob Arum can dub it "Pacquiao-Marquez V: The Return of the Foot Stomp." That should get Pacman's fans fired up to buy the pay-per-view once again.